RSM3213 - Compact 1.2A CoolModule for Space-Constrained Designs
Features
High-Efficiency Power Conversion
- The RSM3213 supports a 2.4V to 4V input voltage range
- Up to 1.2A output current
- Constant-On-Time (COT) control for fast transient response
- Up to 4MHz switching frequency
- ±1% output voltage accuracy
Flexible Operating Modes
- Automatic PFM/PWM mode for high efficiency at light loads
- Forced PWM mode for low-noise operation
- Four selectable output voltage options
Integrated Power Module
- Integrated inductor minimizes external components
- Power-good (PG) output
- Output discharge function
- Compact 2.5mm × 3.0mm × 0.9mm LGA-12 package
Integrated Protection & Reliability
- Overcurrent protection (OCP)
- Short-circuit protection (SCP)
Description
Compact 1.2A CoolModule(TM) for Space-Constrained Designs
The RSM3213 is a highly integrated 1.2A synchronous step-down power module designed for applications where PCB space, efficiency, and design simplicity are critical. By integrating both the power converter and inductor into a compact LGA package, the RSM3213 significantly reduces external component count while simplifying PCB layout and improving system reliability.
Operating from a 2.4V to 4V input supply, the RSM3213 delivers up to 1.2A of continuous output current and supports high switching frequencies of up to 4MHz, enabling the use of smaller external capacitors for high-density designs.
High-Efficiency Power Conversion
Fast Constant-On-Time Control
The RSM3213 utilizes Constant-On-Time (COT) control to provide rapid transient response without requiring complex external compensation. This architecture allows the converter to quickly respond to changing load conditions while maintaining stable output regulation.
High-Frequency Operation Reduces Solution Size
Operating at switching frequencies up to 4MHz, the RSM3213 enables the use of smaller passive components, reducing overall solution size while maintaining high efficiency. Combined with the integrated inductor, this creates an exceptionally compact power solution for portable and embedded systems.
Integrated Power Module Simplifies Design
Integrated Inductor Minimizes External Components
Unlike discrete buck converters, the RSM3213 integrates the power stage and inductor into a single package. This minimizes external BOM requirements, simplifies PCB layout, shortens development time, and helps ensure consistent EMI and thermal performance.
Compact Footprint for High-Density Electronics
The 2.5mm × 3.0mm × 0.9mm LGA-12 package makes the RSM3213 ideal for applications where board space is limited, including wearable devices, optical modules, industrial sensors, and portable electronics.
Flexible Operating Modes
Automatic Efficiency Optimization
The RSM3213 automatically transitions between PFM and PWM operation to maximize efficiency during light-load operation while maintaining excellent dynamic performance under heavier loads.
Forced PWM for Low-Noise Applications
For applications requiring consistent switching frequency and lower output ripple, the device also supports Forced PWM mode, providing predictable performance across the entire operating range.
Integrated Protection Improves System Reliability
The RSM3213 incorporates a variety of protection features to improve system robustness while minimizing external circuitry.
Built-In Protection Features
- Overcurrent protection (OCP)
- Short-circuit protection (SCP)
- Output discharge function
- Power-good (PG) status output
These integrated functions help simplify power sequencing while protecting downstream circuitry during abnormal operating conditions.
Ideal Applications
The compact footprint and integrated design make the RSM3213 well suited for:
- Optical modules
- Smartphones and tablets
- Wearable electronics
- Camera modules
- Industrial IoT sensors
- NB-IoT devices
- Portable embedded systems
Explore Reed’s Integrated Power Modules
The RSM3213 is part of Reed Semiconductor’s family of integrated DC/DC power modules that combine high efficiency, fast transient response, and simplified PCB design. Explore the complete family to find higher current options, including the RSM3203, RSM3204, and RSM3205, all featuring integrated inductors and compact packages for space-constrained applications.
Click here to see the rest of Reed’s expansing Point-of-Load DC/DC converters.
